Respirator



(No Model.) :s sheetssheet 1. G. POZDBNA;l

RBSPIRATOR.

No. 476,486, Patented June '7, 1892.,

yf i v 3 Sheets-Sheet 2.

(No Model.)

G.POZDBNA.

RESPIRATOR.

Patented June 7, 1892.

(No Model.) 3 Sheets-Sheet 3. G. POZDENA. RESPIRATOR. No. 475,486.Patented June 7, 1892.

UNITED STATES PATENT @FriesE GUSTAVE POZDENA, OF CHICAGO, ILLINOIS.

RES PI RATO R.

SPECIFICATION forming part of Letters Patent No. 476,486, dated June 7,1892. Application died February 2, 1892. Serial Nc. 420|l06 (N0 mOdBL)T0 all whom t may concern:

Bc it known that I, Gusrrnvn PozDnNA, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain newv and useful Improvements in Respirators, of whichthe following is a full, clear, and exact description, that will enableothers to make and use the same, reference being had to the accompanyingdrawings, forming a part of this specification, in which- Figure l is aview in perspective looking at the outside; Fig. 2, a similar viewlooking' at the opposite or inner side; Fig. 3, a horizontal section online 3, Fig. 5, lookingin the direction indicated by the arrow; Fig. 4,a horizontal section on line 4, Fig. and Fig. 5, a vertical centraltransverse section on line 5, Fig. 3. Fig. 6 is a vertical longitudinalsection looking inwardly from the front side.

This invention relates to that class of devices used in protecting therespiratory organs from smoke and noxious gases, and has for its objectto provide an arrangement of this character for covering the face, sothat the weareris enabled to remain for an indefinite time in anatmosphere charged with smoke or other deleterious gases withoutinconvenience or injurious ettect.

The device is more especially intended for the use of iiremen or otherpersons when compelled to pass through smoke in saving life or property,but is also adapted for the use of workmen in factories or other placeswhere the air is charged with poisonous gases or dust-laden with matterof a dangerous character. The construction also makes provision for theprotection ofthe eyes as well as the mouth and nostrils.

In the drawings, Ais a casin g or chambered body inclosing theair-passages and which will ordinarily be of the form or contour shown.This casing may be constructed of any suitable material, metallic orotherwise. This casing or body is provided at. its respective ends withdoors B B of iine wire-cloth or gauze and hinged, as at d, so that theymay be conveniently opened and closed, as may be required. Interior-lythe casing is divided into two distinct passages-the lower inhalingpassagc C and theuppereXhaling-passage C'-- by a horizontal diaphragm aextending 1" rom end 'to end and located centrally, as indicated bydotted line fc Fig. Il.

The arrows in Figs. 2, 3, andt indicate the course of the air-currents.

Above the air-passage at the receiving end is located the chamber a2,formed by the diagonal imperforate partition a3, inserted between thetop of the casing and the horizontal diaphragm a', as shown in Fig. 3.The discharge end is provided with a corresponding chamber a4, thediagonal partition d5, Fig. et, being inserted between the diaphragm aand the bottom of the inclosing casing. The air enters the passage Cunder charnber a2 and is discharged through passage C over chamber a4.The screen-doors hinged to the respective ends ofthe casing open intothe air-passages and the chambers arranged alternately above and belowthe same. The face side is provided with a V -shaped recess D, extendingfrom the bottom upwardly and terminating in the nose -like projection b.This recess is inclosed by a Haring rim b. having its edge covered by asoft rubber cushion b2 of a tubular structure. The contour of theflaring rim corresponds to and covers the mouth and nose, the rubberborder iitting closely to the part ofthe face sura rounding those organsand preventing the admission of air into the respiratory charnber formedby the re-entering recess and rim vexcept through the regular channel.The

flexible apron b3, attached to the upper part of the rim, makesprovision for iitting noses of diierent dimensions, so that the faceattachment will always be air-tight. The screenprotected aperture d,Figs. 2 and 4, opens in through the recess-wall at the lower right sideand is covered by the flexible valve d', fastened along its upper edge,so that the same will open into the respiratory chamber by the pressureof the incoming volume of air, but close from any pressure on theopposite side. The screen-protected aperture d2 opens through therecess-wall on the upper left side and is covered on the outer side fromthe respiratory chamber with the flexible valve d3, whereby the airinhaled is exhaled through aperture d2. .A screen-partition d4 extendsacross the inlet-passage from the IOO bottom ot the recess to theinclosing Wall of the casing. A similar partition d5 extends across thedischarge-passage. The relative positions of these partitions areindicated in Figs. 3 and 4, being respectively located above and belowthe central horizontal diaphragm. Thus the incoming current enters underthe central diaphragm through the screen-partition d* and passes aroundthe bottom of the recess D into the respiratory chamber through apertured. The escaping current, after passing out through aperture d2, goesthrough screen or perforated partition (Z5, around the bottom of recessD, and out. By the construction shown suficient space is provided forthe vibration of the flexible valves in the air-passages.

In securing the device to the face the straps e, fastened to the underside of the easing, go around the neck, and the straps e', fastened tothe nose part on pins e2, go around the head. The goggles E E are joinedby the bow connection g and secured to the pins e2, by the Wireconnection g. The transparent part g2 is composed of mica, so as to aordproper protection to the eyes. The straps h provide for securing thegoggle attachment in connection with the respirator. rlhe goggles arealso provided With the elastic cushionborder h', so that they maytclosely around the eyes.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. A respirator-casing provided at its respective ends with doors ofWire-cloth, a central horizontal imperforate diaphragm, inhaling andexhaling passages in different planes, a recess in the face side forminga respiratory chamber, inhaling and exhaling openings in the Wall onopposite sides of said recess and communicating with the respectivepassages above and below said diaphragm, and flexible Valves coveringsaid openings from opposite sides, substantially as set forth,

2. The combination of the respirator-casing provided on the face sidewith a recess, as described, the flaring rim inclosing the recessedpart, the soft elastic cushion bordering said rim, and the ilexibleapron covering the upper part et the rim, substantially as Set forth.

3. A respirator provided With a re-entering recess on the face sideforming a respiratory chamber and having the inhaling and exhalingpassages in different planes, the screen or gauze partitions located insaid passages and extending from the bottoni of said recess to theopposite inclosing Wall, and the valves d d3, substantially as setforth.

GUSTAVE PGZDFNA. lVitnesses:

L. M. FREEMAN, L. B. COUPLAND.

